Phenylurea herbicides

[Diuron]
= 3-(3,4-Dichlorophenyl)-1,1-dimethylurea CAS[330-54-1]
= 3-(3',4'-Dichlorophenyl)-1,1-dimethylurea (ref. ID; 4554)
Trade name; diuron (J, I, A, B): Dailon, DCMU, DMU, Karmex
Chemical formula; C9H10Cl2N2O
Purpose for use; Phenylurea herbicide.
Mode of action; DCMU inhibits photosynthesis at the PSII level by blocking electron transfer between the primary electron acceptor Q(A) and the secondary acceptor Q(B). (ref. ID; 4562)
A photosystem II inhibitor that has the potential to inhibit the electron transport chain; interactions with arylhydrocarbon receptor. (ref. ID; 6758)
Toxicity; LD50 (oral): rat 3400 mg/kg.
Test organisms;
Green algae (formerly included protozoa): Chlamydomonas reinharditii (ref. ID; 4553, 4565)
Protozoa: Euglena gracilis (ref. ID; 4554, 4560, 4562)
Protozoa: Tetrahymena pyriformis (ref. ID; 3554)
Oligochaeta: Eisenia foetida (ref. ID; 7012)
Nematoda: Caenorhabditis elegans (ref. ID; 6758)
Microcosm (ref. ID; 7170)

[Ustinex]
Trade name; Ustinex (Amitrole 30% and Diuron 56%)
Purpose for use; Phenylurea herbicide.
Test organisms;
Oligochaeta: Aporrectodea longa (ref. ID; 6902)
Oligochaeta: Eisenia fetida (ref. ID; 6902)
Oligochaeta: Lumbricus terrestris (ref. ID; 6902)


[Fenuron] CAS[101-42-8] UN2588
= 1,1-Dimethyl-3-phenylurea
Trade name ; Fenuron (I, A, B): Dybar, Fenidin, Fenulon, Karmex-EP, PDU
Chemical formula; C9H10N2O
Purpose for use; Herbicide.
Test organisms;
Protozoa: Colpidium campylum (ref. ID; 6784)

[Fenuron-TCA]
= 1,1-dimethyl-3-phenyluronium trichloroacetate
Chemical formula; C11H13Cl3N2O3


[Isoproturon] CAS[34123-59-6] UN2588
= 3-p-Cumenyl-1,1-dimethylurea
= 3-(4-Isopropylphenyl)-1,1-dimethylurea
= N-(4-Isopropylphenyl)N',N'-dimethyl-urea
Trade name; Isoproturon (I, B): Arelon, Graminon, Hytane, Tolkan
Chemical formula; C12H18N2O
Purpose for use; Herbicide.
Toxicity; LD50 (oral): rat > 4640 mg/kg.
Test organisms;
Oligochaeta: Lumbricus terrestris (ref. ID; 4496)
[Linuron]
= 3-(3,4-Dichlorophenyl)-1-methoxy-1-methylurea CAS[330-55-2]
= N'-(3,4-dichlorophenyl)-N-methoxy-N-methylurea
Trade name; Linuron (J, I, A, B): Afalon, Lorox
Chemical formula; C9H10Cl2N2O2
Toxicity; LD50 (oral): rat 4000 mg/kg, mouse 1500 mg/kg.
Purpose for use; Phenylurea herbicide.
Test organisms;
Protozoa: Acanthamoeba castellanii (ref. ID; 946)

Linuron metabolites
N-(3,4-dichlorophenyl)-N'-methylurea
N-(3,4-dichlorophenyl)-N'-methoxyurea
N-(3,4-dichlorophenyl)urea
3,4-dichloroaniline


Another urea herbicide

[Amitrole]
= 3-Amino-1,2,4-triazole
Trade name; Amitrole (J, I, A, B): Aminotriazole, ATA, Cytrol, Weedazole
Chemical formula; C2H4N4
Purpose for use; Herbicide.

[Dymron]
= 1-(alpha, alpha-Dimethylbenzyl)-3-(p-tolyl)urea] CAS[42609-52-9]
Trade name; Dymron (J): Dimuron, Shouron, Showron, Tolrone
Chemical formula; C17H20N2O
Purpose for use; Herbicide.
Toxicity; LD50 (oral): rat (male) 4000 mg/kg, mouse (male) 6500 mg/kg .

[Methyl dymron]
= 1-(alpha, alpha-Dimethylbenzyl)-3-methyl-3-phenylurea
Trade name; Methyl dymron (J)
Chemical formula; C17H20N2O
Purpose for use; Herbicide.
Toxicity; LD50 (oral): rat (male) 5852 mg/kg, (female) 3948 mg/kg
mouse (male) 5000 mg/kg, (female) 5269 mg/kg

[Siduron]
= 1-(2-Methylcyclohexyl)-3-phenylurea CAS[1982-49-6]
Trade name; Siduron (J, I, A, B): Tupersan
Chemical formula; C14H20N2O
Purpose for use; Herbicide.
Toxicity; LD50 (oral): rat (male and female) > 7500 mg/kg .